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Questions tagged [data-virtualization]

For development issues associated with usage of enterprise data virtualization tools (Tibco DV, Denodo, Informatica DV, etc.)

Data virtualization is any approach to data management that allows an application to retrieve and manipulate data without requiring technical details about the data, such as how it is formatted or where it is physically located.

https://en.wikipedia.org/wiki/Data_virtualization

http://www.compositesw.com/data-virtualization/

66 questions
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Use Data Virtualization when binding to WPF DataGrid and support Sorting

I am binding a large collection (250,000+ records) to a DataGrid. For this to perform well, it must use both UI Virtualization and Data Virtualization. After some research I figured out how to get both virtualizations to work. But as soon as I do a…
bredd
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DataGrid row request patterns with data virtualization

I implemented a data virtualization solution using some ideas from CodePlex and the blog of Bea Stollnitz and Vincent Da Ven Berhge's paper (same link). However I needed a different approach so I decided to write my own solution. I am using a…
Daniel Leiszen
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WinRT Data Virtualization implementation in C#

I have asked this question on the MSDN forum (with no success), maybe StackOverflow will prove its strength one more time... I was attending Hamid Mahmood's session on collection and list apps and was excited to see control-level support for data…
Sergey Aldoukhov
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Performance concern while opening a dialog repetitively in wpf

I have a launch dialog button which creates a view model of a window and bind it to the the window(it is having UI virutalization enabled). It takes only 1 second to launch the dialog at first click. But if I open the same dialog very frequently or…
Yogesh
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How to implement a lazy loaded Silverlight data grid without using paging

Using the Business Application template from the brand new released RIA Services, you can see lots of examples using the data grid on top of a DomainDataSource in combination with a DataPager. The properties PageSize and LoadSize can be used to…
Marc Wittke
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DataGrid requests when shift multiselection with data virtualization

Adding up on a post of 4 months ago which unfortunately didn't receive any answer. I'm basically standing before the same problem when using multiselection in a datagrid with shift. When in somewhere in the middle of a huge list (say it's 1,000,000…
Alex Endris
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Wpf TreeView that has columns, with UI Virtualization and DataVirtualization

I'm looking for a wpf control (free or commercial). The tree should support all the regular tree view Characteristics (styles, data templates, control template, ...) and support being laid out with Columns (sort of like the Watch window in Visual…
Eli Dagan
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DataVirtualization using IObservableVector in Windows 8.1

I load large set of data into the ItemsControl [ 100000 items] in my Windows 8.1 application. When I could read the MSDN documentation, I could see that IObservableVector is the best choice to implement the Random DataVirtualization…
David Bekham
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4 answers

VirtualizingStackPanel with Virtualized List

I am developing an application that is supposed to display a fairly large amount of items that are loaded from elsewhere (say, a database) in a list/grid-like thing. As having all the items in memory all the time seems like a waste, I am looking…
O. R. Mapper
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MVVM vs Data Virtualization

I have a TreeView that is bound to a tree of ViewModel instances. The problem is that the model data is coming from a slow repository so I need data virtualization. The list of sub ViewModel below a node should only be loaded when the parent tree…
bitbonk
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2 answers

Listbox Data Virtualization and Multi-select

I have a listbox that can potentially have a large number of items with backing data. In order to handle data virtualization, I have tied into WPF's UI virtualization by writing a collection that implements the same interfaces as…
esc861
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Using Data Virtualization, the problem of binding a property in ViewModel with SelectedItem of ItemsControl in View

About Data Virtualizatoin in WPF, the WPF: Data Virtualization is a good article. With using this, Data Virtualization was executed as good in my code but there is the one problem, which is that I cannot bind a property in ViewModel with…
Jin-Wook Chung
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How to create a static skeleton of a map using folium with over layers(markers) changing every hour which is hosted over a website using flask?

I am sorry if the question is confusing or doesn't make sense, this is my first project and I'll try to explain it to the best of my capabilities. At first, I thought I would just be hosting a single map that I created using folium and inherited the…
user_id22
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How to get virtual expression in mysql?

I have a table with a virtual field like this one: CREATE TABLE `deleteme` ( `number` int(11), `result` int(11) GENERATED ALWAYS AS (`number` + 1) STORED ) How to get the expression from virtual field result? `number` + 1 I would like…
stramin
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Data virtualization in a WPF listbox

I have a scenario where in I populate a listbox with a 1000 items. I set the ItemsSource property with a source of data. I have a requirement where I need to strike out an item of the listbox based on certain criteria, when the UI loads. I am using…
Sandepku
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